That is very short sighted. Surely if war is bad, then deterring war is good? Saying you would meet your treaty requirements is part of deterrence. Even if in his heart of hearts he knows he doesn't mean it, it would be better to bluff.
What has the Army got to do with it - Admiral West is a.) Retired and b.) and Admiral as well as c.) a Labour raised lord.
'Sabre-rattling' is the preserve of the FCO - not the military.
There may be a place for conscientious objectors - but that is not at the head of our government.
Why does Putin kick off when the yanks say they will put a new missile system in Poland? Because he worries about NATO. NATO has done mre to keep the post WWII peace in Europe than any other factor.